Injured Chris Farrell set to miss Ireland’s Six Nations title charge

• Centre twists his knee ligaments in training on Tuesday• Garry Ringrose, out since summer, ready to replace himChris Farrell is unlikely to feature in the final two rounds of the Six Nations after the Ireland centre twisted his knee in training on Tuesday.Ireland’s head coach, Joe Schmidt, initially laughed off the incident saying the other players had dubbed Farrell, a starter against Wales last weekend in place of Robbie Henshaw who sustained a tournament-ending shoulder injury in the previous round against Italy, Lazarus for the way he quickly resumed training after receiving treatment. …